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21hp intek engine one cyclinder smoking badly when going up hill

I replased valve stem oil seal did not make any difference

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It either has a scored cylinder and piston or a broken piston oil control ring or both

Posted on Nov 07, 2012

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Posted on Jan 02, 2017

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There is blue smoke coming from the tail pipe. I spoke to someone about it and they said its oil in the combustion chamber. If this is the problem, how much would something like that cost to fix?


Hi there,

This advice you received is correct.

Blue smoke emmitted from the tailpipe signifies the engine is burning oil.

Possibilities are:

  • BAD RINGS - and engine with bad rings will not only burn oil, there will also be a significant loss in power, especially noticeable when driving up hill.
  • BAD VALVE STEM SEALS - with this condition, blue smoke mainly appears during acceleration.
  • Turbocharger - if your engine is fitted with a turbocharger, the seals on the turbo could be leaking.
In regards to the Bad rings and Bad valve stem seals, this may require some serious money, unless your vehicle is covered by a warranty.

For Bad rings, you will need to have a "wet compression test" done on your engine to determine if the rings are bad. Having these replaced will be expensive and in some cases, a replacement engine (with a warranty) may be an alternative option (or sell your vehicle and put your money towards another vehicle).

For Valve stem seals, I suggest only having the stem seals replaced (nothing else - don't let them talk you into any major work) to see if this cures the problem first. If blue smoke is still emitted from the exhaust, then you may be up for a major valve job, in which case you should again consider a replacement engine (with a warranty) or selling your vehicle.

Hope this helps...

Aug 27, 2011 | Dodge Neon Cars & Trucks

2 Answers

My 1996 EL Falcon blows smoke only on startup after sitting for at least 8hrs .does not smoke at all after 1-2 mins driving


sounds like valve stem seals...if it is white smoke that is antifreeze , blue smoke is oil....hope that helps

Aug 24, 2009 | Ford Futura Cars & Trucks

1 Answer

My jetta 4 1.9 tdi smokes and no power on mornings ends on 60km/h but after leaving it in the sun for 1 to 2 hours it run well again


When was the last valve adjustment?
An old timing belt and T-belt guide will offset the timing.
Can a shop do a compression test on the engine?
Do a motor flush before the next oil change to free up the rings and clean out the head.
This is the inexpensive method to restore compression.

If it's the org. engine it will has over 80,000 miles on it.

It's normal to has the valve stem seal/oil seal on the head to leak oil into the cyclinder.

The smoke you see is the motor oil drop from the seals.

It land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.
This will help soften the rubber seals and help reduce internal oil leak.

The correct fix is to wait until it's time for a head gasket replacement and let the professional service the head.
Complete head service is the only method to stop this internal oil drip problem.

Jun 15, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

A6 smokey on start up


If it's the org. engine it will has over 85,000 miles on it.
It's normal to has valve stem seal/oil seal on the head to leak oil into the cyclinder on high mileage engine.

The smoke you see is the motor oil drop from the valve stem seals. The oil drops land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.
This will help soften the rubber seals and help reduce internal oil leak.


The correct fix is to wait until it's time for a head gasket replacement and let the professional CRC/service the head.

Complete head service is the only method to stop this internal oil drip problem.

Jun 13, 2009 | 2002 Audi A6

4 Answers

Blue smoke in morning start up


if it constantly is blowing out smoke trhen it sounds like you rhead is cracked. head gaskets or something in that area. it will run but ****. alos try an oil change if u havnt already..

Jun 02, 2009 | 1995 Honda Odyssey

1 Answer

Pajero 1989,too much smoke durong first start


Is it white,black or blue smoke?
If it's the org. engine it will has over 200,000 miles on it.

It's normal to has the valve stem seal/oil seal on the head to leak oil into the cyclinder.

The smoke you see is the motor oil drop from the seals. It land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.

This will help soften the rubber seals and help reduce internal oil leak.

The correct fix is to wait until it's time for a head gasket replacement and let the professional to service the head.

Complete head service is the only method to stop this internal oil drip problem.
I will monitor the oil and coolant level.
White smoke AFTER warm up is the first sign of blown headgasket.

Feb 26, 2009 | 1989 Mitsubishi Sigma

1 Answer

2004 GMC Sierra 1500 blows a cloud of smoke only at startup


If it's the org. engine it will has over 60,000 miles on it.
It's normal to has the valve stem seal/oil seal on the head to leak oil into the cyclinder.

The smoke you see is the motor oil drop from the valve stem seals.

It land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.
This will help soften the rubber seals and help reduce internal oil leak.

The correct fix is to wait until it's time for a head gasket replacement and let the professional service the head.

Complete head service is the only method to stop this internal oil drip problem.

Feb 10, 2009 | 2004 GMC Sierra 2500

1 Answer

Very smokey when started from cold


If it's the org. engine it will has over 90,000 miles on it.

When was your last valve adjustment?

Timing belt is due if it's over 120,000 miles. Incorrect timing will cause late timing.

Can your shop do a compression test?

It's normal to has the valve stem seal/oil seal on the head to leak oil into the cyclinder.
The smoke you see is the motor oil drop from the seals. It land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.

This will help soften the rubber seals and help reduce internal oil leak.

The correct fix is to wait until it's time for a head gasket replacement and let the professional service the head.

Complete head service is the only method to stop this internal oil drip problem.

Oct 29, 2008 | 2001 Volkswagen Passat

1 Answer

Smoking after start up


If it's the org. engine it will has over 160,000 miles on it.
It's normal to has valve stem seal/oil seal on the head to leak oil into the cyclinder on high mileage engine.

The smoke you see is the motor oil drop from the valve stem seals. The oil drops land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.
This will help soften the rubber seals and help reduce internal oil leak.


The correct fix is to wait until it's time for a head gasket replacement and let the professional CRC/service the head.

Complete head service is the only method to stop this internal oil drip problem.

Oct 29, 2008 | 1994 Mazda MX-3

1 Answer

Car blowing out smoke after going down a hill and you press the trottle to go up another .Only then does it do it otherwise the car drives perfect. Is it valve seals piston ring or something else ...


That is usually a sign of worn valve stems/guides or seals.
When you take your foot off the accelerator going down hill you effectively close the throttle, the vacuum pressure created in the inlet manifold will open the throttle slightly and the vacuum will look for "inlet" from anywhere it can and one of these places is down the sides of worn valve stems/guides, it will **** a small amount of oil down the valve guide and the oil burning off when you put your foot back on the accelerator is the smoke you see out of the exhaust.

Aug 10, 2008 | Volkswagen Golf Cars & Trucks

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